I want to go back in time and get an Isolation Tank! My mom had some boyfriend who owned one, and they'd never let me try it out. I think they were afraid I'd score some acid and go all William Hurt on them.
My buddy would hang himself upside down in his gravity booties from the chin-up bar for about ten minutes each morning. I don't know how he did it without hurling, let alone how he'd right himself and get out. Nobody ever had to help him. He does some pretty cool stuff now- his dad won an Oscar for best short doco in the 80s, and now he makes custom rigging/gripping fixtures and does dolly gripping on the set of "Treme", which his wife is also on the writing team for. He was the one who sort of inspired me to become a Chef when I was a kid. He was self-taught and became one of the Sous-Chefs de Partie at the DC Hyatt Regency when he was 20.